Welcome to Riverwalk OBGYN

Overall patient rating:

In 1979 Tristan Castaneda, MD started with a simple premise: Make available to every woman the health resources she needs to live a healthy, active, and long life. At the same time, educate each woman about the importance of preventative health measures. This same idea still drives us today, some 30 years later. The track record we’ve accumulated over the years speaks to our commitment to patients, their families, and the community at large. Both our medical and office staffs are second to none, who genuinely take an interest in individual patient’s needs. We think you’ll notice the difference immediately when you step foot inside our doors. We’d love to see you today to map out a health and wellness plan that’s tailored to your health history and needs.

About Our Practice

  • Providers

  • Services

  • Links And Forms

  • Locations

  • Contact Us

  • Alka Arya Degaetano

    DO
  • Ricardo Munoz

    MD
  • Stephanie Schaefer

    MD
  • Christina Simpson

    MD
  • Heather Williams

    MD

We Provide The Following Services

  • Obstetrics + Reproduction
  • Pregnancy Care and Delivery
  • Contraception
  • Ultrasound and Imaging
  • Gynecology + Wellness
  • Annual Exams
  • Menopause
  • Urogynecology

Riverwalk OBGYN: San Antonio Office

  • Monday: 8:30AM - 5:30PM
  • Tuesday: 8:30AM - 5:30PM
  • Wednesday: 8:30AM - 5:30PM
  • Thursday: 8:30AM - 5:30PM
  • Friday: 8:30AM - 5:30PM

Send Us a Message

    Patient Reviews

    Overall patient rating for Riverwalk OBGYN:

    Gynecological Problem Visit

    Dr. Muñoz is a fine, dedicated doctor who shows deep respect for his patients. He has never rushed my examinations in the 30 or so years I have been seeing him. I trust him for his honesty and knowledge.

    Office Visit / Follow-up

    I had to wait for a long time in the office but liked my visit with the Doctor

    Gynecological Exams

    She was very thorough and clear with everything! Very good at answering all of my needed questions and helpful. Like always

    Menopause Management / Education

    Dr Munoz takes his time to explain my options, he’s patient and kind.

    Annual Well Woman Exam

    Friendly staff, did not feel rushed and doctor spent time making sure all concerns were covered.

    Annual Well Woman Exam

    Dr. Schaefer talked to me about the procedure, asked questions about what is going on with me currently so we could discuss next steps in testing and medication. I appreciate not feeling rushed.

    Gynecological Exams

    Kind doctor and nurse Excellent provider, kind and easy to communicate with.

    Childbirth / Labor & Delivery

    Dr.Simpson is always amazing, listens and actually cares about your well being!

    Annual Well Woman Exam

    I've been Doctor Munoz patient for many years. I follow him from the nix hospital to Alamo. Heights to Stone oaks and out to West Avenue. I like Doctor Munoz. He is a very gentle Doctor when he examined you. You explain everything to you.

    Annual Well Woman Exam

    I usually meet with dr. Arya but she had a schedule change so I met with nurse practitioner and she was Very personable and professional. Loved her.